Amineral is observed to become soft and crumbly and develop a reddish color as it undergoes weathering, what process has most likely taken place?

Corrosion

Explanation:

The corrosion is a natural process that occurs because of the influence of the water and wind. It is part of the processes of erosion. It manages to soften the minerals, make them less stable and more crumbly. It can easily be noticed as it gives the mineral reddish, or rather dark orange color. This process occurs where the humidity is high, as the water plays a crucial role for this process to occur. Apart from occurring in nature, this process is also a big problem with the refined metals, as it gradually destroys them, and taking in consideration that the metals are included in all sorts of objects, it can make a lot of damage.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

they are called fossil fuels